JP3076005B2 - Saw blade for cutting packaging materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saw blade for cutting a packaging material (for example, a wrap film or a foil) used for packaging fruits, meats and other foods and drinks.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing a state in which a scroll packaging material is stored in a packaging box, and FIG. 6 is a perspective view of a packaging box of the scroll packaging material.

[0003] Conventionally, roll packaging materials such as wrap films and foils are generally used for packaging fruits, meats and other foods and drinks. The packaging material 3 used for such a purpose is wound, for example, on a cardboard core as shown in FIG. 5 and purchased in a state of being stored in the packaging box 2 as shown in FIG. From the packaging box 2 and cut by a packaging material cutting saw blade 1 attached to the packaging box 2 for use. On the other hand, packaging materials that are sold without being stored in a packaging box, such as recycled (REFEEEL) products and commercial packaging materials, are wrapping / foil cutters that are separate from this packaging material or commercial wrapping materials. It is cut to a required length by a saw blade 1 for shearing food packaging materials such as a wrap / foil drawer cutter and used.

[0004]

However, when the packaging material cutting saw blade 1 attached to the packaging box 2 is used,
In addition, when using a saw blade for shearing food packaging materials that is separate from the packaging box, or when using a saw blade for shearing various adhesive tapes, hands may be injured or clothes may be damaged. is there.

FIG. 4 is an enlarged plan view showing a conventional saw blade for cutting packaging material.

As shown in FIG. 4, a saw blade 1 for cutting a packaging material is made by stamping and forming a material such as a sheet metal, and has an upper edge and a lower edge in a longitudinal direction for cutting the packaging material. A plurality of thread-shaped blades 4 having a vertical angle A at a constant pitch p are formed. Among the thread-shaped blades 4, the blade at the extreme end (the left end at the upper edge portion and the right end at the lower edge portion in FIG. 4) has a particularly sharp apex angle B. For this reason, not only when the saw blade 1 for cutting the packaging material is used, but also when it is stored or discarded, the human body and clothes are damaged.

Therefore, recently, in order to reduce obstacles and harms to the human body by the saw blade 1 for cutting a packaging material mainly made of metal and to facilitate disposal of environmental waste, synthetic plastic or hard plastic is used instead of metal. Paper saw blades have been developed, but these products have insufficient cutting performance and are difficult to reuse when discarded after use. It is difficult to completely eliminate the obstacles and harms that occur, and cannot completely replace the currently used saw blade for cutting metal packaging materials. for that reason,
Depending on the material of the packaging material to be cut, a synthetic plastic or hard paper saw blade is used in combination with a metal saw blade.

As described above, after the food packaging material and various adhesive tapes are drawn out to a predetermined length, the material of the packaging material cutting saw blade is made tough so that the cutting line becomes a beautiful straight line. In addition, efforts have been made to improve the sharpness by sharpening the thread-shaped blade of the saw blade as much as possible.However, due to insufficient consideration of damage to the human body and clothing, special handling is currently required when handling saw blades for cutting packaging materials. There is a problem that requires attention.

The present invention has been made in view of the above points, and has good cutting performance when cutting food packaging materials and various types of adhesive tapes. It is an object of the present invention to provide a saw blade for cutting a packaging material.

[0010]

In order to achieve the above object, the present invention relates to a packaging material cutting saw blade for cutting a scroll packaging material for packaging foods and the like. A thread-shaped blade is formed, and safety portions are provided on both ends of the thread-shaped blade row on the edge, and the shape of the safety portion is a convex arc-shaped mountain shape.
Further, in the present invention, the height of the safety portion is higher than the thread shape, and the length along the edge of the safety portion is 1 to 10 mm, and the safety portion has a rounded tip of the thread shape blade. And a thread-shaped blade provided only on one longitudinal edge.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of one embodiment of a saw blade for cutting packaging material according to the present invention.

A saw blade 1A for cutting a packaging material according to the present embodiment has, at its upper and lower edges in the longitudinal direction, a constant cutting edge for cutting the packaging material, similar to the conventional one described with reference to FIG. Pitch p
, A plurality of thread-shaped blades 4 each having an apex angle A are formed, and safety portions 5 having a convex arc-shaped mountain are provided at the left and right ends of each of the upper and lower thread-shaped blades 4. This safety portion 5 is higher than the thread-shaped blade 4 and has a length f of 1 to 1.
10 mm is desirable. By providing the safety portion 5 having such a shape at both ends of the packaging material cutting saw blade 1A, the human body, clothes, etc., which come into contact with the saw blade 1A are not damaged. As a result of repeated tests, the following was found. The length f of the safety portion 5 is preferably changed according to the food packaging material or tape material to be used. Normally, 1 to 10 mm is desirable, and if it is shorter than 1 mm, the formation angle of the safety portion 5 becomes sharp and becomes 10 mm or less. If the length is long, it becomes difficult to cut the packaging material. The height h of the safety portion 5 is preferably higher than the height of the thread-shaped blade 4. The thread-shaped blade at the lower edge of the saw blade 1A for cutting the packaging material is not normally used. s indicates the total length of the packaging material cutting saw blade, and d indicates the width of the packaging material cutting saw blade.

FIG. 2 is a plan view of another embodiment of the saw blade for cutting packaging material according to the present invention.

In the packaging material cutting saw blade 1B of the second embodiment, the thread-shaped blade 4 at the upper edge has the same pitch p and apex angle A as those of the conventional one described in FIG. But
The safety portions 6 at both ends of the thread-shaped blade 4
, And has a vertex angle C substantially equal to the vertex angle A, but has a small-diameter rounded portion 7 at the tip and a length p. The angle D shown in FIG.
0 to 150 ° is preferred. By adopting such a shape, there is an effect of not damaging a human body, clothes, etc., which come into contact with the saw blade 1B for cutting packaging material. Note that the thread-shaped blade at the lower edge of the saw blade 1B for cutting the packaging material is not usually used.

As a result of an experiment using the saw blade 1B for cutting packaging material according to the second embodiment described above as a food packaging material, the pitch p of the thread-shaped blade is 1-2 mm, and the saw blade for cutting packaging material is 1 mm. It was confirmed that the width d is 3 to 15 mm, and the total length s of the saw blade for cutting the packaging material is preferably 200 to 310 mm for home use, and about 310 to 460 mm for business use and special use.

FIG. 3 is a plan view of another embodiment of the saw blade for cutting packaging material according to the present invention.

In the first and second embodiments, since the thread-shaped blades at the lower edges of the packaging material cutting saw blades 1A and 1B are not used, as shown in FIG. The saw blade 1C for cutting packaging material can be manufactured by omitting the thread-shaped blade and leaving only the thread-shaped blade at the upper edge. According to the third embodiment, damage to the human body, clothes, and the like due to the thread-shaped blade at the lower edge can be eliminated in advance.

Further, in the present invention, the material of the saw blade for cutting the packaging material is not limited, and can be applied to all metal saw blades and paper saw blades. In addition to the method in which a separately manufactured saw blade is directly attached to a general form packaging box, one edge corresponding to the saw blade mounting position is coated with resin inside the packaging box. Even when the thread-shaped blade is formed directly on a part (edge) of the packaging box, the left and right end patterns of the saw blade formed on the edge of the packaging box are also applicable to the first, second and third embodiments of the present invention. The feature is that the form can be applied.

[0020]

As described above, according to the present invention,
Food packaging materials such as wraps and foils for wrapping fruits, meats and other foods and drinks, as well as transparent tape (eg Scotch tape) often used in homes and industrial sites
By using as a saw blade for shearing various films and tapes such as PP (oriented polypropylene) adhesive tape, the danger to the human body and clothes is largely eliminated or alleviated compared to conventional ones, and at the same time convenient to use The performance is improved.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of a saw blade for cutting packaging material according to the present invention.

FIG. 2 is a plan view of another embodiment of the saw blade for cutting packaging material according to the present invention.

FIG. 3 is a plan view of yet another embodiment of the saw blade for cutting packaging material according to the present invention.

FIG. 4 is an enlarged plan view showing a conventional packaging material cutting saw blade.

FIG. 5 is a perspective view showing a state in which a scroll packaging material is stored in a packaging box.

FIG. 6 is a perspective view of a packaging box of a scroll packaging material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conventional saw blade for cutting packaging material 1A Saw blade for cutting packaging material of the present invention 1B Saw blade for cutting packaging material of the present invention 2 Packaging box 3 Scroll packaging material 4 Screw-shaped blade 5 Safety section 6 Safety section 7 Roundness Part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 5/72 B65H 75/32

Claims (4)

(57) [Claims] 1. A packaging material cutting saw blade for cutting a scroll packaging material for packaging food or the like, wherein a plurality of thread-shaped blades are formed at an edge in a longitudinal direction, and the thread-shaped blade is formed on the edge. A saw blade for cutting a packaging material, wherein safety portions are provided at both ends of a thread-shaped blade row, and the shape of the safety portions is a convex arc-shaped mountain shape. 2. The height of the safety portion is higher than the thread shape, and the length along the edge of the safety portion is 1 to 10 mm.
The saw blade for cutting packaging materials according to claim 1, wherein: 3. The saw blade for cutting packaging material according to claim 1, wherein the safety portion has a rounded tip of the thread-shaped blade. 4. The saw blade for cutting packaging material according to claim 1, wherein a thread-shaped blade is provided only at one longitudinal edge.